Pump.



No. 741,813. V PATENTED OCT. .20, 1903.

0. R.-MO0RE.

PUMP,

APPLICATION FILED APR. 4, 1903.

N0 MODEL. 3 SHEETS-SHEET 1.

INVENTOR QWQSQW ATTORNEY PATENTED 00$. 20, 1903.

'0. R. MOORE.

PUMP.

APPLIGATIG 'I'LED APR. 4, 19.03.

3 SHEETS-SHEET}.

N0 MODEL.

1 N VENTOR A Wi WITNESSES ATTORNEY mo WASHINGTON n c No. 741,813; rPATENTED 0011. 20, 1903.

G. R. MOORE; r

PUMP.

, APPLICATION mum 11.4, 1903. N0 10pm. a MEETS-SHEET a.

WITNESSES-2 l INVENTOR ATTORNEY N4 0:12. in: scams rrrzns 00.. mom-unionwasuma'm iio. 741,1313.

Patented October 20, 1903.

' PATENT @EETCE,

CHARLES R. MOQRE, OF ELMIRA, NEW YORK.

PUMP.

FSPECIFIGATION formingpart of Letters Patent No. 741,813, dated October20, 1903.

' Application filed April 4, 1903. Serial No. 151,074. (No model) NewYork, have invented certain new and useful Improvements in Pumps, ofwhich the following is a specification.

My invention relates to improvements in pumps of the double-acting type,and has to .do more particularly with pumps intended for fire-enginepurposes, wherein the plangers are required to travel at a high speedwith a comparatively short stroke. In this class of pumps it isessential that the casing and working parts shall be as compact as itpossible and of as small weight as compatible with the strength requiredfor high-pressure Water-delivery. It is also essential that theinlet-valves shall be of sufficient number and capacity to freely admitthe water, so that it shall follow the plunger and fill the pumpbarrelto the full length of the stroke when the plunger is traveling at highspeed. Heretofore much difficulty has been experienced in providingsuflicient valve area for this p'urpose on the suction side of pumps ofthis type, much loss in efficiencybeing experienced when running at highspeeds, due to the excessive lift required of the valves and thenecessary slippage as the valves are reseated upon the back stroke ofthe plunger. Moreover, where the combined areas of the valve-openin gsare closely proportioned to the plunger area much loss is experienceddue to the friction of the water in passing through the valve-ports. To

.render a pump of this type efficient, therefore, it is essential thatthe suction-valves shall be of as large area as possible in order toreduce friction loss and also to reduce the lift of the valves in orderto avoid undue slippage.

It is therefore the object of my improvements to provide a compact andstrong pump in which the valve partitions and chambers shall be soarranged and positioned as to increase the efiiciency in a given size ofpump.

A further object is to so arrange the working chambers of the pump as tobring both the suction and discharge valves into close proximity to theplungers, and thereby reduce the air-spaces to a minimum, and a finalobject is to provide valve-chambers so arranged that all the valves,both suction and delivery, may be quickly got at for purposes of renewalor repair through adequate openings closed by screw-caps instead ofbolted plates, as is now the general practice, the screw-cap being morequickly removable and susceptible of being given a more water-tightpacking.

I attain my objects by means of. the arrange.

ing a section on line 4 4 in Fig. 2; and Fig. 5,

a section on the line 5 5 in Fig. 2, showing the parts somewhatdistorted for the purposes of illustration.

Like letters refer to like parts in the several views.

A represents the main pump-casing, which comprises substantially twocylinders integrally united and having also integrally formed therewiththe partitions and walls which form the suction and pressure chambers,the valve-partitions, both suction and delivery, the suction-inlet, andthe connections for the vacuum and air chambers and for the outlet ordelivery gates. The heads, both at top and bottom of the main-casingcylinders, are contracted at B and are closed by screw-caps C, thesecaps being provided with annular packing-ribs adapted to setinto groovescut in the heads upon packing-rings, of lead or other suitable material,as indicated at c. The upper caps are provided with stuffing-boxes at D,through which pass the plunger-rods E. At the forward sides of thecasing-cylinders are substantially rectangular projections F F, set atan angle, substantially as shown, and forming intercommunicatin gpressure-chambers P. The front walls of these pressure-chambers areprovided with hand-holes, closed by the screw-caps G, opposite each setof delivery-valves, these caps being formed substantially in the samemannor as the'head-caps O and being packed in the same Way by lead orother packing rings or washers 9. These caps O and G will be providedwith spanner-holes, as indicated, or notches for the purpose of settingthem up or loosening them for removal. At II the pressure chambers areprovided with screwt-hreaded openings to receive the usual shutoffgates, to which the hose is coupled. Instead of one outlet at the centerof each chamber, as shown, I may havetwo outlets at each side in thelarger sizes of pumps, thereby providing for leading off four lines ofhose instead of two, as in the present instance. At the back of the maincasing is a transverse cylindrical offset J, provided at each end withscrew-threads at I to receive the connections for the suction-hosecouplings. The cylindrical offset J permits of the insertion of astrainer extending from one side to the other between thesuction-openings. Offsets K are provided opposite each cylinder toreceive the usual vacuum-chambers, and at L at the top of thepressure-chambers is an opening which leads to the air-chamberconnection, (not shown,) which is flanged and bolted in place in thecustomary manner.

At the center of each cylinder of the main casing is a barrel M,preferably provided with a removable lining N, through which travels theplunger 0, attached to the rod E. Encircling the top and bottom of thebarrels M are the outwardly-inclined valve-partitions Q, around whichare disposed the valve-seats R, which are screwed into suitably boredand tapped openings in said partitions. By this angular arrangement ofthese partitions it will be evident that an increased valve area can beattained in the space between any given diameters of pump-barrel andmaincasing cylinder. Moreover, it will be evident that since thevalve-seats point to a common center a smaller opening for thecylinder-heads is permissible, and I am therefore enabled to usescrew-caps instead of bolted plates for these closures. Thevalve-openings may be readily got at, when the cylinder heads or capsare off, for the purpose of preparing them to receive the valve-seatsand for inserting the valve-seats therein, and the valves themselves maybe quickly and easily placed in position or removed for repairs. Inaddition to this it will beseen that the valves are set close around theplunger at each end of its stroke and that therefore the workingchambers between the suction and delivery valves are reduced in area,thereby also reducing the air-spaces at the ends of the plunger strokes.Surrounding the barrels between the partitions Q, is a commonsuctionchamber S, into which the suction connection J opens.

The continuity of the. conical partitions Q is broken toward the frontof the pump opposite the pressure-chambers P by the downwardly-inclinedpartitions T, terminating in the dividing-partition U, whereby areformed two longitudinal passages leading from the ends of the barrels tothe delivery-Valves. These delivery-valves are set upon thevertichambers correspondingly.

cal partitions V, which are provided with valve-seats W in the usualway, as will be seen in Fig. 4. There are three deliveryvalves for eachend of the pump, the valveseats being arranged so that the single valvesare placed opposite one another toward the center, thereby permittingthe walls T of the working chambers to be inclined toward one another,and so reducing the area of these It will be noted in this connectionthat the valves at each end are in the proportion of five suction tothree delivery, from which fact it will be seen that the inflow from thesuction-chamber will be ample to fill the working chambers at all times,even when running at very high speed. From an inspection of Fig. 5 itwill be seen that the delivery-valves are all accessible upon removingthe screw-caps G and that there is ample opening provided for theinsertion of tools to prepare the valve-openings to receive thevalve-seats W and for inserting or replacing the valves. In thisconnection I may say that I preferably use a stud for the valves, whichis screwed fast to the valve-seats, the outer end of the stud beingscrew-threaded to receive a pronged nut 10, 1 which latter is held fromunscrewing bymeans lot a split pin passed through a hole at the end ofthe stud, as indicated more clearly in Fig. 5.

In order to brace and stiffen the front walls 5 of the pressure-chambersP, I connect them with the rear walls at the center, as indicated at Xin Fig. 3, with a brace-bar formed integrally therewith in the processof casting. In like manner other strengthening ribs and braces may beformed where needed to stiffen the various walls and partitions whencasting the pump.

Between the suction-chamber S and pressure-chambers P is a partition Y,which passes across from one pump barrel to the other, and at the centerof this partition I provide a passage Z, adapted to be opened and closedby a valve .2, controlled by the hand-wheel .2 on a valve-stem whichpasses out at the front through a suitable stuffingbox. When open, thispassage Z forms a communication from the pressure to the suction side ofthe pump and permits the water to circulate from one side to the otherwhen the plungers are in operation and the deliveryvalves are closeddown for anyreason, as is frequently required when a fire-engine is inservice.

In the smaller sizes of pumps I will use two delivery-valves at each endinstead of three, as shown in the accompanying drawings, and thesuction-valves will be correspondingly reduced in size and increased innumber, thereby permitting me to bring the casing-cylinders closer tothe pump-barrels and rendering the pump still more compact. Othervariations in the details of construction may be made Without departingfrom the spirit of my invention, and I do not,therefore,restrict my-Having described the novel features of my improved pump, what I claim asmy invention, and desire to secure by Letters Patent,

1. In a pump, the combination of a casing, a pump-barrel centrallylocated therein, inclined valved partitions extending around between thecasing and each end of the barrel, a discharge-chamber, valved passagesleading to said chamber from the spaces formed at each end of the casingoutside said partitions, a suction connection leading into thewater-chamber formed between the casing and pump-barrel, and an outletfrom the discharge-chamber.

2. In a pump, the combination of a casing having its ends contracted andclosed by removable caps,a pump-barrel centrally located in said casing,outwardly-inclined partitions extending around between the casing andeach end of the barrel,valves disposed around said partitions andpointing to common centers outside the casing-heads, a dischargechamber,valved passages leading to said chamber from the spaces formed betweensaid partitions and the casing-heads, a suction connection leading intothe water-chamber formed between the casing and pump-barrel, and anoutlet from the discharge-chamber.

3. In a pump, the combination of a casing, a pump-barrel centrallylocated therein, outwardly-inclined valved partitions extending aroundbetween the casing and each end of the barrel, longitudinal passagesbreaking through said partitions at one side of the barrel, a centraltransverse partition separating said passages, a discharge-chamberseparated from said passages by valved partitions, a suction connectionleading into the Waterchamber formed between the casing and pump-barrel,and an outlet from the discharge-chamber.

4. In a pump, the combination of a casing having its ends contracted andclosed by screw-caps, a pump-barrel centrally located in said casing,outwardly inclined partitions extending around between the casing andeach end of the barrel,valves disposed around said partitions andpointing to common centers outside the casing-heads, longitudinalpassages breaking through said partitions at one side of the barrel,acentral transverse partition separating said passages, adischargechamber separated from said passages by.

valved partitions, a suction connection leading into the Water-chamberformed between the casing and pump-barrel, and an outlet from thedischarge-chamber.

5. In a pump, the combination of a casing comprising two cylinders setside by side and integrally united, the ends of said cylinders beingcontracted and closed by removable caps, a pump-barrel centrally locatedin each of said cylinders, outwardly-inclined partitions extendingaround between the cylinders and barrels at each end thereof, valvesdisposed around said partitions and pointing to common centers outsidethe casing-heads, longitudinal passages breaking through said partitionsat the sides of the pump-barrels, central transverse partitionsseparating said passages, discharge-chambers separated from saidpassages by valved partitions, said chambers being set at an angle toand intercommunicating with one another, hand holes closed by removablecaps in the outer walls of said chambers opposite each group ofdischarge-valves, a partition running across between the barrels wherebya common waterchamber is formed around the barrels behind thedischarge-chambers, a suction connection leading into saidwater-chamber, and outlets from the discharge-chambers.

6. In a pump, the combination of a casing comprising two cylinders setside by side and integrally united, a pump-barrel centrally lo: cated ineach of said cylinders, outwardly-inclined partitions carryingsuction-valves eX- tending around between the cylinders and barrels ateach end thereof, longitudinal passages breaking through said partitionsat the sides of the pump-barrels, central transverse partitionsseparating said passages,dischargechambers separated from said passagesby valved partitions, said chambers being set at an angle to andintercommunicating with one another, a partition running across betweenthe barrels whereby a common water-chamber is formed around the barrelsbehind the discharge chambers, a suction connection leading into saidwater-chamber, and outlets from the discharge-chambers.

7. In a pump, the combination of a casing comprising two cylinders setside by side and integrally united, a pump-barrel centrally located ineach of said cylinders, partitions carrying suction-valves extendingaround between the cylinders and barrels at each end thereof,longitudinal passages breaking through said partitions at the sides ofthe pump-barrels, central transverse partitions separating saidpassages, discharge-chambers separated from said passages by valvedpartitions, said chambers being set at an angle to andintercommunicating with one another, a partition running across betweenthe barrels whereby a common water-chamber is formed around the barrelsbehind the discharge-chambers, and a hand-operated valve in saidpartition whereby communication may be opened between the suction anddischarge sides of the pump.

8. In a pump, the combination of a casing, a pump-barrel centrallylocated therein, partitions extending around between the casing andbarrel at each end thereof, suction-valves carried thereby, longitudinalpassages at one side of the barrel breaking through said'partitions, acentral transverse partition separating said passages, and adischarge-chamber separated from said passages by valved partitions.

9. In a pump, the combination of a casing, a pump-barrel centrallylocated therein, partitions extending around betweenthe casing andbarrel at each end thereof, suction-valves carried thereby, longitudinalpassages at one side of the barrel breaking through said partitions, acentral transverse partition sepa-

